/**
 * Copyright 2006 gworks.com.au
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License. (http://www.apache.org/licenses/LICENSE-2.0)
 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License is distributed 
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for 
 * the specific language governing permissions and limitations under the License.
 *
 * <dhamma-message src="Atisha (11th century Tibetan Buddhist master)">
 * 	The greatest achievement is selflessness. The greatest worth is self-mastery.
 * 	The greatest quality is seeking to serve others. The greatest precept is continual awareness.
 * 	The greatest medicine is the emptiness of everything. The greatest action is not conforming with the worlds ways.
 * 	The greatest magic is transmuting the passions. The greatest generosity is non-attachment.
 * 	The greatest goodness is a peaceful mind. The greatest patience is humility.
 * 	The greatest effort is not concerned with results. The greatest meditation is a mind that lets go.
 * 	The greatest wisdom is seeing through appearances. 
 * </dhamma-message>
 */
package org.javaongems.client.stdctrls;

import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Element;
import com.google.gwt.user.client.ui.Widget;

/**
 * <p>Provides a very basic progress indicator. Last minute hack for the upload
 * facility.</p>
 * 
 * <p>Notes:
 * <ul>
 * 	<li> Can someone, anyone, please tell me why this does not render in the
 * 	form widget?
 * </ul>
 * </p>
 * 
 * TODO: add color and orientation configuration
 * @author Ashin Wimalajeewa (ash)
 */
public class ProgressBar extends Widget {
	protected Element barDiv;
	protected Element progressDiv;
	private int position;
	private int max = 100;

	public ProgressBar() {
		barDiv = DOM.createDiv();
		setElement(barDiv);
		progressDiv = DOM.createDiv();
		DOM.setInnerHTML(progressDiv, "&nbsp;");
		DOM.setInnerHTML(barDiv, "&nbsp;");
		DOM.appendChild(barDiv, progressDiv);
		initialiseWidget();
	}
	
	public int getProgressPercentage() {
		return (int) ((float) position / (float) max) * 100;
	}

	public void setPosition(int n) {
		position = n;
		paint();
	}
	
	public int getMax() {
		return max;
	}
	
	public void setMax(int n) {
		max = n;
		paint();
	}
	
	public void reset() {
		setPosition(0);
	}
	
	protected void paint() {
		int perc = getProgressPercentage();
		DOM.setStyleAttribute(progressDiv, "width", perc + "px");
	}

	private void initialiseWidget() {
		DOM.setStyleAttribute(barDiv, "width", "100px");
		DOM.setStyleAttribute(progressDiv, "width", "0px");
		DOM.setStyleAttribute(barDiv, "height", "18px");
		DOM.setStyleAttribute(progressDiv, "height", "18px");
		
		DOM.setStyleAttribute(barDiv, "background-color", "grey");
		DOM.setStyleAttribute(progressDiv, "background-color", "navy");
	}
}
